To a certain extent APG, but the last time I saw my grandson (11) I was completely unable to understand him. We had to explain that whilst everyone can use one sort of language to communicate with friends, we all need to know, understand and be able to use a common code of English. Without that there is no understanding. He did start using normal language after that. I think he was showing off how 'with it' - if that's the expression these days - he is.
It had become a problem before I retired from teaching.